function [ X, Y ] = getTstMat( this, ds, iRep, jFld, kSubFld )
%GETTSTMAT Address test data subset
%          of i-th repetition, j-th fold, k-th sub-fold

if nargin == 1 || nargin == 2 || nargin == 3 || nargin == 4
    error('BatErr: Invalid input arguments.');
end

zId = this.getZTstId(iRep, jFld, kSubFld);

X = ds.dmX(zId, :);
Y = ds.dmY(zId, :);

end
